[exim] Milter-greylist on FreeBSD

Hi all,

I wanted to give greylisting a try, but am not currently prepared to do all
the SA-Exim changes at this moment.

I am running freebsd with Exim 4.6x and was wondering if the milter-greylist
port could be used with Exim.

If so, can someone point me to a link, or show me brief instructions?

TIA,

-Grant